Switch-plug.



W. & F. S. MURRAY.

SWITCH PLUG.

APPLICATION man was. 1910.

1 1 86, 1 2 1 Patented June 6, 1916.

VIII/[II Ill/I110 B'WITCH-PLUG.

Specification of Le: Patent; Pat gg tgfi Jung (& 133211;

ipplieaticn. filed August 5, 1915"v *Serial No. 5575,6492.

;; uUwlmm it ma umwm'n: plates 8 mid l) tend to spring outward from;

lie ll known that we, llhxmi-iiz the su o; the hodjnportlon and have aand l neoiqmmt S. ldvmux, holh citizens limited movement toward and fromthe Univ 5 lmdvmortion. This movement is limited by 5 m f 153 bgygufvllor I shoulders 17 and. 18 carried at the rear end mun ti, and "date ofFlow Y of the hochi-portion these shoulders formi l. and useful 7 h1g1recesses whirh receive the free ends-of mt s in l'fill'ifllof which thefolthe (outset plates. l he free ends of the lowing; is 51spi-i-iioafion, springs are th s protected from injury and Thisinvention relates improveimxnts in are prevented from catching onextraneous s eh plugs d {mod to he readily inserted bodies.

into and withdrawv11 from elm-tried sooh'ots Formedigitegrnllv with thehodv-portion of plugging boxes or oi other ole 'nl eons an exihlrgedheel 19 which 1s provided l i with a groove 2b to receive the cable 7.EX-

15 The invention consists er thefealureshere tending across the heel 19and bridging the set iorthzmd morepin .larl ipoiutreco: 2G is a heelwlOQl 21. which preferi ably is "formed with a recess to match ling thereoess 20, these two recesses forming a llU}, 'rylindrirnl opening forthe cable. The heel )rovlded with two extensible posts fixed rein andpassing through apertures 2-3 of the heel block, the arrangement beingsuch that the heel block may he li': a; ddownin placehythe extensibleposts 5' so to firmly grip the cable and prevent Y strain thereon beingcommunicated to rrly to the the connectors at the ends of the conductoris hotly-poi ion of the branches 5 and (3. lhis arrangement alsoXIlllifll is preferably of rectanserves to prevent the outer shoa'ithingof the cross section, as shown. The cable from slipping when the cableis under t '1 on the law" s-section e -7ori3ion provided with tworecesses strain, and prevents this sheathing from- 3 i on opposite sidesto -l'8C81YO the rave-ling.

cable conductors 5 and 6 which brunch fronr In the preferred arrangementof the the cable 7. These red-asses and sare clamping posts eachcomprises a tribe 25 35 preferably made of a depth saiilieient to whichhas an internal. threaded portion 26 receive the conductor brancheswholly heand screw 27 whieh works in the threaded health the outersurface of the body-poi tube. -Nhen the posts are extended by relion,traotiiig the screws, the block 21 is released o contactp ates and mayhe slipped upward on the tubes as 8 and v are two spril i so which h otheir forward d' hent over far as the heads of the screws or the washtherorzvn 1 end of the imdv-portion and ers 28 under the screw heads willpermit there in place by end l0 and l i hen the screws are turned in theopposite 5 11. These C(Tllllct plat-es are located on the direction theblock 21 is forced downward sides not occupied liv the recesses andfirmly to place against the cable. The lower The end screws 10 and 11enter met-allie ends of the screws 27 are enlarged, as shown pl and 13which buried in the in Fig. 3, to prevent the screws from being t-h plugand extend rearward completely withdrawn from thetubes. The 0 *"oosedthe doors oi? t e inner surface of the recesses 20 and Z2 is forConnection with pro ided with screw threads or is otherwise i The minimJ'ied so {15 to sink into and grip the 3 of cable.

is proi :tion extending the for- 1 of the hodpportion end between thescrews 10 and 11, iis purpose lacing to prevent accidcntai electrical.connection between these screws.

The body-portion, the heel and heel block are formed of insulatingmaterial.

VFllflf is claimed and what is desired to he semired by Letters men: is:

l. A switch plug comprising a body-port io-* provided wiiii springContact plates cxioi along fiwo op} itc Sides thorcof, said contactplates hair; oent over the forward end of the body 1 onion and herecured in place by end screws. said body-portion having shoulders at itsrear end to engago the free ends of said spring contact platen and limittheir movement from the sides of iho body-portion.

2. A switch ploq comprising a body-pmiion provided with contact platesextending along two opposite sides thereof, and having countersunkelongated recesses on the other two sides to receive the conductorlir-inchcs, said contact plates being hcnt over the it'orrcard end ofthe bod wportion and Micro occur-ed in place by end screws, studs r alim]'f{1}r"n 3; winniu 1n inccanoo or no poiiion o i com said cnd'scrcwsand exposed in said elongated recesses for connection with the.conductor branches.

A switch plug, comp-rising a l)O(i:VPOY- tion provided with springcontact plates cx-- tending along two opposite sidos thcrcof, and havingcountersunk clongatcd rcccsscs on the other two sides to receive. thecorn dnotor branches, said spring contact platcs liming bent c'rcr thoforward end of tho hody portion and their secured in placc by cndscrews, studs buried in the ends of the body portion to receive said endscrews and 0xposc-d in blllil clongzaicd recesses for connection withthe conductor branches, said bodyportion having shoulders at its roarcnd to engage the iron ends of said spring contact plat s and lilni tlir nnivcincni from the body-portion.

In testimony whcrcoi'. wc havo signcd our names in this Spcciiication.in the pi'cscnco of two subscrib ng witncsscs.

W Al IIER MI RRA Y. FhiQDE-RICK S. MURRAY.

Witnesses H. M. tinumxs, Km G. (limioins.

